On February 25th, Tracksmith Hare AC runner and Boston College grad Louis Serafini became the 514th American to break 4 minutes in the mile, running 3:59.33 at Boston University's Last Chance Meet.

Louis joined David and co-host Conor Cashin, manager at Heartbreak Hill Running Company and captain of the Heartbreakers club team, to talk about how he did it. We also got very silly and spent much of the episode gently teasing him.

Enjoy!